40 C.F.R. § 86.1804-01
The following abbreviations apply to this subpart:
A/C-Air conditioning.
AECD-Auxiliary emission control device.
A/F-Air/Fuel
ALVW-Adjusted Loaded Vehicle Weight.
API-American Petroleum Institute.
ASTM-American Society for Testing and Materials.
BAT-Bench-Aging Time
C-Celsius.
cfm-Cubic feet per minute.
CFV-Critical flow venturi.
CFV-CVS-Critical flow venturi-constant volume sampler.
CH3OH-Methanol.
CID-Cubic inch displacement.
Cl-Chemiluminescence.
CO-Carbon monoxide.
CO2-Carbon dioxide.
conc.-Concentration.
CST-Certification Short Test.
cu. in.-Cubic inch(es).
CVS-Constant volume sampler.
DDV-Durability Data Vehicle.
deg.-Degree(s).
DNPH-2,4-dinitrophenylhydrazine.
EDV-Emission Data Vehicle.
EP-End point.
ETW-Equivalent test weight.
F-Fahrenheit.
FEL-Family Emission Limit.
FID-Flame ionization detector.
ft.-Feet.
FTP-Federal Test Procedure.
g-gram(s).
gal.-U.S. gallon(s).
GC-Gas chromatograph.
GVW-Gross vehicle weight.
GVWR-Gross vehicle weight rating.
H2O-Water.
HC-Hydrocarbon(s).
HCHO-Formaldehyde.
HDV-Heavy-duty vehicle.
HEV-Hybrid electric vehicle.
HFID-Heated flame ionization detector.
Hg-Mercury.
HLDT-Heavy light-duty truck. Includes only those trucks over 6000 pounds GVWR (LDT3s and LDT4s).
HLDT/MDPV-Heavy light-duty trucks and medium-duty passenger vehicles.
hp-Horsepower.
HPLC-High-pressure liquid chromatography.
IBP-Initial boiling point.
in.-Inch(es).
IUVP-In-Use Verification Program.
K-Kelvin.
kg-Kilogram(s).
km-Kilometer(s).
kPa-Kilopascal(s).
lb.-Pound(s).
LDT1-Light-duty truck 1.
LDT2-Light-duty truck 2.
LDT3-Light-duty truck 3.
LDT4-Light-duty truck 4.
LDV/LLDT-Light-duty vehicles and light light-duty trucks. Includes only those trucks rated at 6000 pounds GVWR or less (LDT1s and LDT2s).
LDV/T-Light-duty vehicles and light-duty trucks. This term is used collectively to include, or to show that a provision applies to, all light-duty vehicles and all categories of light-duty trucks, i.e.
LDT1, LDT2, LDT3 and LDT4.
LEV-Low Emission Vehicle.
LPG-Liquefied Petroleum Gas.
m-Meter(s).
max.-Maximum.
MDPV-Medium-duty passenger vehicle.
mg-Milligram(s).
mi.-Mile(s).
min.-Minimum.
ml-Milliliter(s).
mm-Millimeter(s).
mph-Miles per hour.
mV-Millivolt
N2-Nitrogen.
NDIR-Nondispersive infrared.
NLEV-Refers to the National Low Emission Vehicle Program. Regulations governing this program are found at subpart R of this part.
NMHC-Nonmethane Hydrocarbons.
NMHCE-Non-Methane Hydrocarbon Equivalent.
NMOG-Non-methane organic gases.
NO-nitric oxide.
No.-Number.
O2-Oxygen.
OEM-Original equipment manufacturer.
NO2-Nitrogen dioxide.
NOX-Oxides of nitrogen.
Pb-Lead.
pct.-Percent.
PDP-CVS-Positive displacement pump-constant volume sampler.
ppm-Parts per million by volume.
PM-Particulate Matter.
ppm C-Parts per million, carbon.
psi-Pounds per square inch.
R-Rankin.
RAF-Reactivity adjustment factor.
rpm-Revolutions per minute.
RVP-Reid vapor pressure.
s-Second(s).
SAE-Society of Automotive Engineers.
SBC-Standard Bench Cycle
SFTP-Supplemental Federal Test Procedure.
SI-International system of units.
SRC-Standard Road Cycle
SULEV-Super Ultra Low Emission Vehicle.
TD-dispensed fuel temperature.
THC-Total Hydrocarbons.
THCE-Total Hydrocarbon Equivalent.
TLEV-Transitional Low Emission Vehicle.
UDDS-Urban dynamometer driving schedule.
ULEV-Ultra Low Emission Vehicle.
UV-Ultraviolet.
vs-Versus.
W-Watt(s).
WOT-Wide open throttle.
Wt.-Weight.
ZEV-Zero Emission Vehicle.
40 C.F.R. §86.1804-01